It is produced by the TsKIB SOO,[1] Central Design and Research Bureau of Sporting and Hunting Arms.
The MTs255 is unique in that the forearm extends nearly all the way back to the cylinder.
The shotgun is reloaded in a manner consistent with that of most modern revolvers, by unlocking the cylinder, and swinging it away from the frame to the left and down.
Media related to MTs-255 at Wikimedia Commons
This article relating to shotguns is a stub.